Pressure applicator



Aug. 2o, 1940. H, MEDART 2,211,904

PRESSURE APPLICATOR Filed Feb. 7, 1939 Inventor;

Gustav fMedar,

Patented Aug.Y 20,' 1940 orrlce emissions APPIJCATOR Gustav H. Medart, Los ngeles, Calif. applicati@ February 7, 1939, serial No. 255,055 s claims. (01.32-40) My invention relates to pressure applicators which are useful for installing dental 'restoration parts, and it is especially adapted for such work as setting inlays, bridges and crowns.

The principal objects of the invention include: iirst, to provide a substantially improved device of the character indicated; second, to furnish means whereby heavy resilient pressures may be maintained upon dental restoration parts, during the few moments required for cementing, at

' exact pre-determined positions; third, to afford convenient facilities for holding back the lips and cheeks of patients while performing the restoration work; and, fourth, to secure all .of

these advantages in a simple, dependable, and

relatively inexpensive construction.

My objects have been attained in the manner illustrated in the accompanying drawing, in which- Figure l is a side elevation of thev complete pressure applicator;

Figure 2 is a view of the bottom thereof, when the device is lturned upside down; and

Figure 3 is a sectional elevation taken on the plane indicated by broken line 3 3 of, Fig. 2.

Similar reference numerals refer to similar parts throughout the several views.

In order to install cemented dental parts in a wholly satisfactory manner, it is necessary to maintain fairly heavy resilient pressures thereon, at exact pre-determined positions, while the cement is setting. Such positions, in most cases,

approximate the geometric pressure centers of the parts, with vrelation to the direction of the applied force. The pressures should be resilient,

so as to follow up all movements which result from outward ilow of excess cement. All ordinary dental patients, in biting, are capable of exerting an entirely adequate force for the purpose, by the use of my applicator.

In the embodiment of my invention which has been selected for illustration, an elongated manipulating element, which is indicated generally by arrow 5, affords; a base portion 6 near one end, for accommodating the pressure parts; a handle portion l at the other end, constituting a convenience for the operator and a means for holding back the lips and cheeks of patients; a

resilient finger 8, extending from the base portion; and engagementmeans S, on the inner side of the finger.

A bezel Il is rotatably mounted upon element 5, at the center of base portion 6, by means of a specially formedpivot l2. The under surface of the bezel is provided with a series of spaced the work being done.

complementary engagement means I3, arranged infa circle which is `concentric with the pivot, and these are adapted for co-operation with engagement means 9. This arrangement permits holding the bezel atfvarious pre-determined anguiar positions with respect to the longitudinal axis of element 5, as suggested by dottedline I4. Pivot i2 has a conical point l5 at its outer end;

preferably, it is providedwith a cylindrical seating surface IS, thereabove and Vcontiguous 10 to base 6,l to adapt it for engaging other types of effective extremities when such are desired.

Within the cup of bezel il, is a mass ll of resilient material such as rubber,` which may be retained in place by being sprung into the bezel. 15 This mass provides a surface which cannot injure the tooth of a patient; and, by its use, strong biting pressure may be exerted upon conical point l5, or upon such other effective pivot extremities as may be seated upon surface |6. 20

lvly applicator may be utilized in various ways, which will be apparent to skilled dental operators, during the preparation and fitting of restoration work. After applying cement, the restoration part may be positioned approximately, and 25 conical point lEibe placed against it at the exact pre-determined position. The patient may then be instructed to bite hard upon rubber mass Il, and tomaintain the biting pressure. The force of the bite will-be concentrated on the pre-deter- 30 mined pressure point of the restoration part; and the maintained heavy pressure may be made Ato force out all excess cement, while it still is fluid.

The resilient masswill cause no discomfort to the patient while biting; and it will materially 35 aid in the pressure follow-up, required because of the outward ow of excess cement.

it is to be remarked that, before placing the applicator in the patients mouth, bezel l l should be set with respect to the longitudinal axis of ele- 40 ment 5, at the most suitable angle-for performing the work. After the bite has been exerted i by the patient, handle portion l may be moved sideways to press the patients lips and cheek outwardly; to a point where a new engagement 45 takes place between parts 9 and I3. The handle portion will then lbe retained in its new position, and this will aiord maximum access for It will be obvious that my invention may as- 50 sume various forms, which will suggest themselves to those skilled in the art. Therefore the scope of the invention is broader than that of the 4embodiment selected for the purposes of 55 this disclosure, and is limited only by the breadth of the appended claims.

I claim as my invention:

1. A device of the characterdescribed, comprising; a manipulating element aording, a base portion for pressure parts, a iinger extending from the base portion, and engaging means on the iinger; a pressure pad pivotally connected to said base portion, and positionable at a plurality of definite angles with respect to the longitudinal direction of said element by virtue of said engaging means; and a pressure point extending from the manipulating element in a direction opposite to that of the pressure pad, co-axial with said pivotal connection; the manipulating element, by reason oi said variable positionability, being adapted to restrain the lips and cheeks of a patient exerting a biting pressure against said pad and point.

2. A device of the character described, comprising; a manipulating element affording, a base portion for pressure parts, a resilient positioning ringer extending from the base portion, and engaging means on the linger; a bezel pivotally connected to said base portion, having a plurality of complementary engaging means arranged in a circular arc co-axial with said pivotal connection; a pressure point extending from the manipulating element in a direction opposite to that of the bezel, csc-axial with said pivotal connection; and yieldable material conned by the bezel and affording a resilient biting surface opposed to said pressure point.

3. A device of the character described, comprising; a manipulating element affording, a base for pressure parts adjacent one end, a handle portion at the other end, a resilient positioning iinger extending from the base portion, and engaging means on the nger adjacent its extremity; a bezel pivotally connected to said base portion, having a plurality of complementary engaging means arranged in a circular arc co-axial with said pivotal connection; a pressure pin extending from the manipulating element in a direction opposite to that of the bezel, cci-axial with said pivotal connection; a seating surface on said pin adapted to (Io-operate With said base for retaining a pressure element mounted Y thereon; and resilient material confined by the bezel and affording a biting surface opposed to said pressure pin; the manipulating element, by reason of the Variable mutual positionability of said engaging and complementary engaging means, being adapted to restrain the lips and cheeks of a patient exerting a biting pressure against said material and pin.

GUSTAV H. MEDART. 

